Machine for grinding and sanding rubber printing rollers



Dec. 15, 1931.,

G. c. SPKZER 1,836,941

MACHINE FOR GRINDING AND SANDING RUBBER PRINTING ROLLERS Filed Jan. 7,1950 4 sheets-sheet 1 A F/oor L/ms l N V5 N T OR Geo v52 6. SPICE/Q ATTOR/VE Y Dec. 15,, 1931. G C SPICER 1,836,941

MACHINE FOR GRINDING AND SANDING RUBBER PRINTING ROLLERS Filed Jan. 7,1930 4 sheets sheet 2 1N VENTOR GEO VEE C, 5p/cE e A TTORNEY Dec. 15,1931. G. c. SPICER MACHINE FOR GRINDING AND SANDING RUBBER PRINTINGROLLERS Filed Jan. 7, 1950 4 Sheets-Sheet 3 IN VENTOR G/eovE/e C 5p/csfBY a,

A TTORNEY @Q. 35, E931. G, 3, SPICER 1 836.94];

' MACHINE FoR GRINDING AND SANDING RUBBER PRINTING ROLLERS Filed Jan. 7.1930 4 Sheets-Sheet 4 INVENTOR G/E'ovfie C. SPICE)? I /0 ATTORNEYPatented Dec. 15, 1931 UNITED STATES GROV'ER G. SPIGEIB, OF CLEVELAND,OHIO MACHINE FOR GRINDING AND SANDING RUBBER PRINTING ROLLERSApplication flied January 7, 1930. Serial No. 419,035.

This invention relates to a machine for rough grinding, finish grindingand sanding any size rollers, especially rollers of yielding materialsuch as the rubber rollers used in the printing industry, and will alsogrind to a grain finish, rubber rollers such as are used in lithographwork. One object is to grind to a dimension predetermined by the use ofa sliding adjustment in conjunction with a fixed scale. Another objectis to finish the roller to the necessary smoothness straight or crownedas desired by means of a four faced sanding attachment or turret head.

This machine is self contained, motor driven and fully enclosed, and isequipped with dust recovering devices;- when adjusted to the operationdesired, it is automatic until that operation is completed.

Other objects may be readily noted from the following specifications andaccompanying drawings, in which:

Fig. 1 is a front elevation of the grinding and finishing machine.

Fig. 2 is a top plan view of the machine with the top cut away.

Fig. 3 is a vertical section with the upper wall of the machine cutaway, approximate ly on line 33 of Fig. 2, with the pulleys and gearsshown diagrammatically where section is cut away.

Fig. 4 is a partial side elevation showing the grinding attachment inposition.

Fig. 5 is a top view ofthe grinding at tachment with the grinding wheelin section.

Fig. 6 is aperspective view of the grinding wheel. 7

Fig 7 is a fragmentary section of the grinding wheel.

Fig. 8 is-a partial sectional view of the sanding attachment.

Fig. 9 is an enlarged portion of the above showing the clamping andtightening device in section.

Fig. 10 is a fragmentary section of the bed of the machine showing theguide rail portion on which the roller moves as being mounted on alifting jack in its center portion.

Fig. 11 is an enlarged sectional view showing the guide rail in elevatedposition.

Fig. 12 is a fragment of the top plan view showing the elevationsettings.

Fig. 13 is an enlarged section taken on line 1313 of Fig. 4.

Referring to the drawings the frame structure is shown at 1 havinghorizontal guide ways 2 and 2 which support and guide the carriage 3which contains the usual propelling and reversing gears (not shown)driven by shaft 4 and reciprocating the carriage in a known manner.

- The carriage 3 has a vertical sliding head 5 moving in a dovetail slot6 in the front of carriage 3 which head has an opening 7 in which eitherthe grinding attachment 8 or the sanding attachment 9 may be insertedand locked in position by screw 10.

plunger 11 extends upwardly into sliding head 5 said plunger 11 having akeyway 12 on one side into which fits a dog point screw 13 whichprevents the plunger 11 from turning but permits head 5 to slide up ordown. Plunger 11 is engagedby a threaded rod 14, fitted into a threadedbore in the upper end of said plunger, which is threaded up to theshoulder 15 above which, it extends through the head 5 and through athreaded bushing 16 which screws into the rigid support 17 mounted ontop of the carriage 3, the threaded rod 14 having on its upper end ahand feed wheel 18, which when turned to the right screws rod 14 downinto plunger 11 thus lowering head 5. Around the said rod 14 is atension spring 19 mounted between boss 20 on head 5 and shoulder 21 onthreaded bushing 16 which has afeather key 22 fittted into the side;thus when threaded rod 14 is turned down in the plunger 11, the bushing16 driven by feather key 22, follows, keeping an even tension on thespring 19 and so lowering head 5; until lifting roller 23 on the lowerend of plunger 11 rests against guiderail 24, and the sanding attachment9 is in correct working position.

Guide rail 24 is only used when the sanding attachment 9 is used and hasvarious purposes. Its top face 25 runs parallel with the roller 26 andhas two lifting wedges 27 and 27' which are adjustable and placed on.

r the guiderail 24 opposite each end of the along the ways 2 and 2' thelifting roller 26 but is approximately 3 A; inches out of line beingnarrower at the one end than the other; thus guide roller 31 attached toarm 117 of sanding attachment 9 by bolts 118 moving along this edge 30causes the sanding attachment 9 to move at an angle across the roller26.

A second set of ways 32 and 32, shown in Figs. 2, 3 and 4, are used tosupport two adjustable bearing sections 33 and33 with quick changingboxes which fit different size roller stocks.

The roller 26 is driven by a flexible coupling 34 which is driven by adriven pulley 35 which when grinding is driven by a pulley 36 giving aworking speed of 12 R. P. M. to 18 R. P. M. by the use of a variablespeed motor 37, but, when sanding, driven pulley 35 is driven by pulley38 giving approximately 1000 R. P. M. Pulley 39 is driven by ulley 40 atapproximatel 500 R. P. M. and pulley 41 is used to rive grinding wheel55, idlers 42 and 43 being mounted on sliding head 5, and are a meansfor keeping an even tension on driving belt 44 which runs between thesaid idlers from the pulley 41 to the grinding wheel pulley 45 when thegrinder is used.

When grinding, the reversing stops29 and 29 are moved back out of theway. The knob 105 is pushed in which changes gears to slow speed and thecircuit breakers 46 and 46' are set forward on the upper way 2 to apoint where the contact fingers 47 or 47 attached to the top of carriage3 move over the said circuit breakers as the grinding wheel 8 reachesthe end of the roller 26, thus stopping the motor 37, said contactsbeing in the motor circuit. Sliding head 5 is set by a scale 48 to thecorrect finished diameter and. is then looked in position by screw 49.

.The T shaft 50 of the grinding wheel attachment 8 is held in theopening 7 in the sliding head 5 by means of the locking screw 10 whichfits in the opening 52 in the T shaft 50, the flange 53 of the said Tshaft being pressed against the front of the sliding The driving shaft54 is mounted on bearings 55 in the sleeve head 56 of the T shaft 50,the pulley 45 being suitably attached to one end of the driving shaft.54 to the other end of which is attached a grinding wheel 51 heldbetween the narrow shoulder 56 on driving shaft 54 and the nut 113.

The grinding wheel 51 is hollow and epen at one side as shown in Figs. 5and 6. The band of abrasive material 114 is drawn tightly around theoutside of the wheel frame 57 and the ends are inserted in slot 58, inthe frame 57 through the slotted bolt 59, the nut 60 is then turned downagainst lock washer 61 which tightens the sanded material 114 until itis held rigidly over the frame 57.

The sanding attachment 9 may replace the grinding attachment 8 and ismounted in the sliding head 5 in the same manner as the grindingattachment 8. The said sanding attachment consists of a shaft 62 whichis hollowed at 63 into which tension spring 64 is inserted; and the openend 65 is threaded to receive plug 66 which is turned into the opening.The shaft 62 is slotted through at 67 to permit the pin 69 to moveforward or back freely with the sleeve 68 through which the pin 69 isjournaled holding the spring 64 in the hollowed portion 63 and alsoprevents sleeve 68 from turning; the sleeve 68 has a shoulder 70 at oneend and is threaded at the opposite or front end on which a lock lever71 is turned. The sanding frame 72 is mounted between the shoulder 70and the lever 71 on sleeve 68 and has four flat surfaces each with adifferent grade of sanding and polishing material, which are heldtightly in position at each end by means of the upper jaw portions 73and 7 3 and the lower jaw portions 74 and 74 between which the materialis drawn and locked in position by cap screws 75 on jaws 73 and 73' andtightened down by use of the bolts 7 5 which, when turned in the lowerjaw portions 74 draw the flanges 76 along the dovetail grooves 77 inframe 72 until the lower jaw portions 74 are in the desired position.

When ,it is necessary to change the grade of sanding material, the lever71 is pushed back allowing frame 72 to swing over until the ball 78slides out of depression 79 in frame 72 and presses back against spring80 which is held in position in receptacle 81 in shoulder of sleeve bythe plug 82, when in the new position the ball 78 slides into depression79' locking into position.

In the center of the back wall of the frame 1 is a powder container 83which has an agitator 84 which is operated by gears 85 and 86 on shaft87 which rotates the agitator 84 causing the powder to move around inthe container. A ri id tube 88 is equipped with a nozzle 89 whicprotrudes through the rear wall of the container 83 and projects forwardinto a funnel shaped tube 90 which is an integral part of the container83 and fits through an opening in the frame 1, and to the tube 90 isattached a flexible hose 91 the other end of which is attached to arigid tube 92 supported through a bracket 93 fastened byv suitable meansto the carriage 3 and extending forward close to roller 26. A slidingvalve 94 when opened permits the air from the blower 95 to move upwardthrough the rigid tube 88 to the nozzle 89 which picks up the disturbedair and blows it through the funnel shaped tube 90 and the flexible hose91, the rigid tube 92 having attached to its forward end a spray nozzle96 which sprays the powder onto the roller 26 as the flexible hose 91allows the sprayer to move with the carriage 3. This powder sprayingattachment is used only in conjunction with the sanding attachment 9.

A roller crowning device 97 is attached at each end to the guide railblocks 98 by means of the bolts 99 fastened through the slotted ends ofthe crowning device 97 which slots 100 permit the device 97 to slideforward as the lifting jack 101, attached to the center of the device 97through the boss 102, and to the guide rail 24 through the boss 103, isturned up in the threaded boss 102 of the device 97 till the slot orgroove 104 in the head of the lifting jack 101 is at the correct settingindicated on the surface of the crowning device 97.

The bed 106 of the frame 1 has twofunnel shaped depressions 107 and 108which are connected to the blowers 95-and 109 and into which the refusefrom the grinding and sanding is drawn to be blown through theconnecting tubes or pipes 110 and 111 to the refuse box 112.

The grinding attachment is also equipped with guard 113 and cover 114 towhich guard is attached a flexible hose 115' which enters the connectionto blower 95 just below the funnel shaped depression 107 in bed 106 thuscarrying-oil the refuse from the grinding operation; the grinding wheelis held within the guard 113 and cover 114 and as the wheel 55 revolvesit throws the refuse into the mouth 116 of the guard 113, and so downthrough the blower 95 to the refuse box 112 as heretofore described.

It will be evident that changes may be made from time to time in theabove construction that will not depart from the spirit or scope of theinvention.

I claim:

1. A roller abrading machine comprising ways, a support for theroller,va carriage movable along the ways, a tool-holding headadjustably mounted on the carriage, a tool supa guide-rail having asurface along which the head travels, and an edge for guiding the tool,and an arm projecting from the sleeve and bearing against said edge toshift the sleeve and tool as the latter travels along the roller.

3. A roller grinding machine comprising in combination a frame havingways, and supports for the roller, a carriage movable along the ways, anabrading tool, a tool holding head adjustably mounted on the carriage,and means to adjustthe head including an adjustable plunger carried bythe head, a guide rail along which the plunger travels, and a crowningrail adjustable on the guide rail and upon which the plunger bears as ittravels.

1. In a roller abrading machine, the combination of a support for theroller, a traveling carriage, a tool mounted on the carriage to travelalong the roller, a sand box, a nozzle carried by the carriage andflexibly connected to the box, means to force a blast of sand from thebox and through the nozzle and against the roller, adjacent the tool,and a casing enclosing the roller, carriage and tool.

In testimony whereof, I do afiix my signature.

GROVER O. SPIGER.

porting arm projecting from the head, a tool shiftable axially on saidarm, a guide rail having one surface along which the head travels, andmeans actuated by another surface of said guide rail to shift the toolat an angle to the axis of the roller as it travels along the roller.

2. A roller abrading machine comprising a traveling carriage, a headadjustable on the carriage, an arm prdjecting from the head, aspring-pressed sleeve slidable axially on said arm, a tool supported onsaid sleeve,

